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Finding the Fourth Proportional to 439,348.85, 606,128.06 and 275,909.21

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Solution

The fourth proportional to 439,348.85, 606,128.06 and 275,909.21 is: 380,645.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,348.85 : 606,128.06 = 275,909.21 : x
  2. Step 2: Convert to fraction form
    439,348.85/606,128.06 = 275,909.21/x
  3. Step 3: Cross multiply
    439,348.85x = 606,128.06 × 275,909.21
  4. Step 4: Simplify right side
    439,348.85x = 167,236,314,193.43
  5. Step 5: Solve for x
    x = 167,236,314,193.43/439,348.85
  6. Step 6: Final answer
    x = 380,645.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.